Question

Atomic radii of the noble gases are larger than the precedent elements of the same periods because.

• A. Atomic radius of a noble gas is expressed as van der Waal's radius
• B. Valence shell electrons are completely filled so there are interelectronic repulsions
• C. Both $\left(A\right)$ and $\left(B\right)$
• D. None

Answer 1

The correct option is C Both $\left(A\right)$ and $\left(B\right)$

Noble gases have fully filled outershell due to which their radius is expressed as Vander Waal's radius which represents the overall size of the atom which includes its valence shell in a non-bonded situation.And since valence electrons are completely filled therefore there are interelectronic repulsion, thus their size are larger than the precedent element.